diff --git a/Dockerfile b/Dockerfile
index 907b5e1..3e5de88 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,5 +19,9 @@ ENV PATH="$PATH:$BUILD_TOOLS_LATEST/bin"
 ENV LIBRARY_PATH="$LIBRARY_PATH:$BUILD_TOOLS_LATEST/lib"
 
 RUN yes | sdkmanager --install "build-tools;33.0.2"
-RUN yes | sdkmanager --install "plattforms:33"
-RUN useradd -m -s /bin/bash app
+RUN yes | sdkmanager --install "platforms;android-33"
+RUN apk add setpriv
+COPY entrypoint.sh /entrypoint.sh
+RUN chown 0:0 /entrypoint.sh
+RUN chmod 0700 /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
diff --git a/apk/Makefile b/apk/Makefile
new file mode 100644
index 0000000..4aecfa5
--- /dev/null
+++ b/apk/Makefile
@@ -0,0 +1,54 @@
+JAVA_HONE = /usr/lib/jvm/java-8-openjdk
+ANDROID_HOME = /root/sdk
+TOOLCHAIN = /Users/amon/grive/development/Android/NativeToolchain
+GCC = $(TOOLCHAIN)/bin/aarch64-linux-android-gcc
+CXX_FLAGS = -march=armv8-a --sysroot=$(TOOLCHAIN)/sysroot
+
+
+say_hello:
+	echo "this was a test"
+
+all: build deploy 
+
+.PHONY : build
+.PHONY : deploy
+.PHONY : clean
+
+deploy :
+	adb install -r ./bin/hellojni.apk
+
+build : ./bin/hellojni.apk
+
+./bin/hellojni.apk :  ./bin/signed.apk
+	$(ANDROID_HOME)/build-tools/23.0.3/zipalign -v -f 4 $< $@
+	
+./bin/signed.apk :  ./bin/unsigned.apk ./ToyKey.keystore
+	$(JAVA_HOME)/bin/jarsigner -verbose -keystore ./ToyKey.keystore -storepass armena -keypass armena -signedjar $@ $< helljniKey
+		
+./bin/unsigned.apk : ./bin/classes.dex 
+	$(ANDROID_HOME)/build-tools/23.0.3/aapt package -v -f -M ./AndroidManifest.xml -S ./res \
+	-I $(ANDROID_HOME)/platforms/android-23/android.jar -F $@ ./bin
+#	$(ANDROID_HOME)/build-tools/23.0.3/aapt add $@ lib/arm64-v8a/libhello.so
+		
+./bin/classes.dex : ./obj/com/example/hellojni/HelloJni.class
+	$(ANDROID_HOME)/build-tools/23.0.3/dx --dex --verbose --output=$@ ./obj
+	
+#./lib/arm64-v8a/libhello.so : ./jni/hello.o
+#	$(GCC) -shared $< -o $@
+	
+#./jni/%.o : ./jni/%.c
+#	$(GCC) $(CXX_FLAGS) -fPIC -c $< -o $@
+		
+./src/com/example/hellojni/R.java : $(shell find ./res -type f)
+	$(ANDROID_HOME)/build-tools/23.0.3/aapt package -v -f -m  -S ./res -J ./src -M ./AndroidManifest.xml \
+	-I $(ANDROID_HOME)/platforms/android-23/android.jar
+
+./obj/com/example/hellojni/HelloJni.class : ./src/com/example/hellojni/HelloJNI.java  ./src/com/example/hellojni/R.java
+	$(JAVA_HOME)/bin/javac -source 7 -target 7 -d ./obj -classpath $(ANDROID_HOME)/platforms/android-23/android.jar -sourcepath ./src $<
+	
+./ToyKey.keystore : 
+	$(JAVA_HOME)/bin/keytool -genkeypair -validity 1000 -dname "CN=some company,O=Android,C=JPN" -keystore $@ \
+	-storepass armena -keypass armena -alias helljniKey -keyalg RSA -v
+	
+clean:
+	rm -f ./bin/* ./lib/arm64-v8a/* 
diff --git a/docker-compose.yml b/docker-compose.yml
index 8702390..f7c456c 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,9 @@
 version: "3.9"
 services:
-  app-compiler:
+  compile:
     build:
       context: .
     stop_grace_period: 1s  
-    entrypoint: sh -c 'sleep infinity'
+      #command: ["id; sleep infinity"]
+    volumes:
+      - ./apk:/apk
diff --git a/entrypoint.sh b/entrypoint.sh
new file mode 100644
index 0000000..6eeafba
--- /dev/null
+++ b/entrypoint.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+cd /apk;
+VOLUID="$(stat -c "%u" /apk)"; 
+VOLGID="$(stat -c "%g" /apk)"; 
+CMD="${*:-"make"}"
+setpriv --reuid $VOLUID --regid $VOLGID --clear-groups sh -c "$CMD"
+